Dish Brush for Sweeping Machines with Demountable Segmental Plate Elements provided with Brush Plugs.

ABSTRACT

A dish brush for conventional sweeping machines has a polygonal central base plate and trapezoidal demountable or removable segmental plates each provided with multiple brush plugs. I-shaped radial profiles are equispaced about the periphery of the base plate, are welded to apices thereof, and have respective axes radially directed toward a center of the base plate. The central base plate has contour edge plates  4  fixed to a planar center portion via two of the I-shaped radial profiles and inclined at an angle relative to the planar center portion. The demountable segmental plates are each slidable to mount between two I-shaped profiles and are each bolted to a respective one of the contour edge plates.

The present invention concerns a demountable dish brush for sweeping machines for cleaning, brushing and sweeping paved surfaces such as streets, squares etc. The dish brush is built up with a central dish formed plate with a polygonal contour. Said polygonal contour is executed in such a way, that with an easy handling, segmental plate elements provide with a set brush plugs are mountable or demountable on or from the central base plate of the dish brush.

BACKGROUND OF THE INVENTION

A somewhat similar dish-shaped brush for sweeping machines is known from the European Patent Application EP 1 623652 A1, filed 23 Jul. 2004, titled; “Rotating Dish-Shaped Brush for Sweeping Machines”, applicant Koti Onroerend Goed B. V., Weert, The Netherlands; Inventor M. J. R. L. Huybreckx, Weert, The Netherlands.

This patent application described a special gutter brush for sweeping machines. Mentioned brush is mountable or demountable in a rather complicated and time consuming sense. The brush is built up as a complicated constructed ring element, in which the individual brush elements are pushed with a sliding movement. Said brush elements are executed as a single plug with a connecting head plate for said sliding movement. When all the single plugs are placed, the ring with the plugs are covered with a circular plate and locked up with screws. To replace the plugs, the whole dish brush has to be demounted, which is a time consuming drawback and the construction of the dish brush is also very costly.

So, this embodiment of the dish-shaped brush does not have the inventive characteristics of our newly developed dish brush with a central dish plate executed as a polygon with more hook points, in which in between a complete set of brush plug can be mounted or replaced in a row in a very simple way.

Then, a second patent application EP 3 560 378 A1 is known and relevant in some way. This European Patent Application was filed with a Priority Dutch Patent Application NL 104 284 2 dated 25 Apr. 2018; titled: “Dish Brush for Sweeping Machines”. The Applicant is Koti Onroerend Goed B. V., inventor M. J. R. L. Huybreckx, Weert, The Netherlands.

In this patent application, two embodiments of the dish brush for the conventional sweeping machines for cleaning paved surfaces are described. The two types of dish brushes are only mountable and demountable as a whole. Not the individual brush plugs, because of the welded joints. So, if the brush plugs are worn out, the dish brush is completely lost, as well as the steel central plate. In an environmental sense this is a considerable drawback. Another drawback is the big volume and the weight of the complete dish brush, which has to be transported to the user.

So, our invention overcomes mentioned drawbacks and has very positive characteristics, wherein the heavy steel central base plate is usable again and again after demounting the worn out segmental plate elements with their brush plugs. This inventive embodiment lowers the costs when using and transporting only the segmental plate elements. The transport volume is also much lower, because only segmental plate elements with their brush plugs have to be send to the user. So, lower transport costs.

OBJECT OF THE INVENTION

The aim of the invention is to produce and provide very effective and environmentally friendly dish brushes for sweeping machines at a lower price as usual.

SUMMARY OF THE INVENTION

Dish brush for conventional sweeping machines to clean, brush or sweep paved surfaces (streets, squares, etc.), wherein the central base plate with contour D and thickness d at the raised contour is provided with demountable sweeping elements in which mentioned central base plate has a polygonal contour and at the hook points are provided with I-shaped radial profiles with their axis directed to the centre of said central base plate, wherein mentioned demountable segmental plate elements with a trapezium surface are slidable between the I-shaped profiles with their brush plugs and locked up with a single screw bolt in a single borehole.

The advantage is that the intermediate brush plugs of the set brush plugs a circular and perpendicular thereon oscillating brush movement executes over the paved surface. This movement increases the quality of the brushing in a serious way as appears in practical use. Because of the fact that only the demountable segmental plate element with the set of brush plugs has to be demounted and a new one has to be mounted, the central base plate can be used again and again. So, in practice the costs of brushing are lower than with the usual dish brushes.

Furthermore, the dish brush according to the invention is developed in such a way characterized in that the polygonal contour of the central base plate has n angular hook point, which depend of the diameter D. wherein n is 4 till 10, for D is up to 500 mm, preferably n=6, wherein the diameter D is between 240 mm and 920 mm, preferably mostly up to 500 mm.

The advantages are, that for each used diameter D a suitable polygon contour can be fabricated with a minimum loss of material.

Then the dish brush according to the invention is further developed in such a way, that the central base plate has a raised contour with an angle a preferably up to 30 degrees, wherein the demountable segmental plate elements are slidable to mount between the I-shaped profiles and fixed with mentioned screw.

In practical sense, the advantage is a simple mounting and mechanically strong and stiff connection.

Furthermore, the dish brush according to the invention is developed in such a way, that the material of the central base plate is a steel plate with a thickness d between 4 mm and 10 mm, preferably 5 mm for D is up to 500 mm, wherein the material of the separately demountable segmental plate elements is steel with a thickness d between 3 mm and 6 mm, preferably 4 mm.

The advantages are a minimal use of material and therefore a minimal weight and volume in transport to the user.

Then, the dish brush according to the invention is further developed in such a way, that the material of the separately demountable segmental plate elements is a plastic, being for instance polypropylene (or other material, see description in the text).

The advantage is a further weight reduction of the segmental plate elements, which is advantageous for transport to the user.

Furthermore, the dish brush according to the invention is further developed in such a way, that said brush plugs are executed as flat sweeping elements with a length between 220 and 300 mm, preferably 260 mm and with a U-form metal holder connected with the demountable segmental plate elements

The advantage is, that usual sweeping elements are used.

Then the dish brush according to the invention is further developed in such a way, that the demountable segmental plate elements are provided with segmental rounded plate part on the outside to give the dish brush a total circular diameter D, wherein the thickness d is the thickness and the material of the segmental plate elements.

The advantage is that scouring against kerbstones does not damage the hook points of the polygonal contour of the central base plate.

BRIEF DESCRIPTION OF THE DRAWING

A preferred embodiment of the present invention will now be described with reference to the accompanying drawing in which;

FIG. 1 shows a view in oblique projection of the complete dish brush according to the invention;

FIG. 2 shows a top view of the dish brush of FIG. 1 and over the line II-II;

FIG. 3 shows a top view of the central base plate with a polygonal contour (hexagonal in this case) according to a preferred embodiment of the invention;

FIG. 4 shows a side view of the central base plate of FIG. 3 over the line IV-IV;

FIG. 5 shows an oblique projection of the demountable segmental plate element with a trapezium surface according to the invention; and

FIG. 6 also shows an oblique projection of the demountable segmental plate element with trapezium surface and a further segmental plate to give the total dish brushes of the FIGS. 1 and 2 a circular contour in top view.

FIG. 1 represents a view in oblique projection the complete dish brush 1 according to the invention. The complete dish brush 1 consists of two parts, the central base plate 2 and the demountable segmental plate elements 3. The central based plate had raised contour edge plates 4 and with the welded fixed I-shaped radial profiles 5 forms the hook points 6 for precisely sliding the demountable segmental plate elements 3 with their trapezium surface. Said central base plate 2 and said demountable segment plate elements 3 are fixed together with a single screw 7 in boreholes 8.

Mentioned I-shaped radial profiles 5 are directed to the centre 9 of said central plate 2. The demountable segmental plate elements 3 have a set brush plug 10 positioned in a row.

In FIGS. 2 and 3 the polygonal contour of the centre base plate 2 is reproduced in a sharp way. The same parts always have the same numbers. Both FIGS. 2 and 3 are top views of the central base plate 2. FIG. 2 shows a top view over the line II-II from FIG. 1 , the whole dish brush 1 with the central base plate 2 and the demountable segmental plate elements 3. FIG. 3 only shows the central base plate 2 with the raised edge plates 4.

FIG. 4 shows a side view over the line IV-IV of figure. This figure shows the radial directed I-shaped profiles 5.

FIG. 5 shows an oblique projection of the demountable segmental plate elements 3 with the fixed brush plugs 10 with the metal holders at the bottom side. These brush plugs 10 and the demountable segmental plate elements 3 and are also made of PA (Polyamide/Nylon), PBT (Polybutylenetereftalaat), PE (Polyethylene), PP (Delrin/Polyacetate), PVC (Polyvinylchloride), Rubber, Steel, RVS, Copper, Bronze.

FIG. 6 shows an oblique projection of the demountable segmental plate element 3 with a trapezium surface and a further fixed segmental plate element 11 to provide the dish brushes of FIGS. 1 and 2 with an overall circular contour.

Finally it has to be emphasized, that a preferred embodiment of the invention is described and that it is self-evident that further modifications are possible without leaving the scope of the invention. 

1. Dish brush for conventional sweeping machines that clean, brush or sweep paved surfaces, comprising a polygonal central base plate and a plurality of demountable or removable segmental plates each provided with multiple brush plugs, wherein said polygonal central base plate is provided with I-shape radial profiles with respective axes radially directed toward a center of said central base plate, wherein said demountable segmental plates are trapezoidal and are each slidable with the respective brush plugs between respective two of the I-shaped radial profiles and are each locked to the central base plate by a respective single screw bolt in a single borehole.
 2. (canceled)
 3. Dish brush as in claim 1, wherein the central base plate has a planar center portion and a raised contour fixed to said planar center portion and inclined at an angle of up to 30 degrees relative to said planar center portion, wherein the demountable segmental plate elements are each slidable to mount between the respective two I-shaped profiles and are each fixed to the raised contour of the central base plate with said respective single screw bolt.
 4. (canceled)
 5. (canceled)
 6. (canceled)
 7. (canceled)
 8. (canceled)
 9. Dish brush as in claim 3, wherein said demountable segmental plate elements are each provided with a respective segmental rounded plate part on a radially outer side to give the dish brush a circular periphery, wherein the segmental rounded plate parts have a thickness equal to a thickness of the segmental plate elements.
 10. Dish brush as in claim 3, wherein the raised contour comprises a plurality of contour edge plates each mounted along opposing edges to a pair of the I-shaped radial profiles.
 11. Dish brush as in claim 10, wherein the contour edge plates are fixed relative to said planar center portion and are inclined at said angle relative to said planar center portion.
 12. Dish brush as in claim 11, wherein said I-shaped radial profiles are disposed at apices of said planar center portion and are welded to said planar center portion, each of said contour edge plates being welded along the respective opposing edges to the respective pair of the I-shaped radial profiles.
 13. Dish brush as in claim 1, wherein said demountable segmental plate elements are each provided with a respective segmental rounded plate part on a radially outer side to provide the dish brush with a circular periphery, wherein the segmental rounded plate parts have a thickness equal to a thickness of the segmental plate elements.
 14. Dish brush as in claim 1, wherein the polygonal central base plate includes a planar center portion and a plurality of planar contour edge plates affixed thereto, each of the planar edge plates being inclined at an angle of up to 30 degrees relative to said planar center portion, wherein the demountable segmental plate elements each extend adjacent to an underside of, and parallel to, a respective one of the planar contour edge plates.
 15. Dish brush as in claim 14, wherein the planar contour edge plates are affixed to the planar center portion via two of the I-shaped radial profiles.
 16. Dish brush as in claim 15, wherein said I-shaped radial profiles are disposed at apices of said planar center portion and are welded to said planar center portion, said contour edge plates being welded to the I-shaped radial profiles.
 17. Dish brush as in claim 1, wherein said I-shaped radial profiles are disposed at apices of said polygonal central base plate.
 18. Dish brush for conventional sweeping machines that clean, brush or sweep paved surfaces, comprising a polygonal central base plate and a plurality of demountable or removable segmental plates each provided with multiple brush plugs, wherein said polygonal central base plate is provided along an outer periphery with a plurality of angularly spaced connector elements configured for receiving said demountable or removable segmental plates, further comprising locking or attachment elements engageable with said demountable or removable segmental plates and said polygonal central base plate, said locking or attachment elements being configured for releasably attaching said demountable or removable segmental plates to said polygonal central base plate.
 19. Dish brush of claim 18 wherein said angularly spaced connector elements comprise I-shaped radial profiles with respective axes radially directed toward a center of said central base plate.
 20. Dish brush of claim 19 wherein the central base plate has a planar center portion and a raised contour fixed to said planar center portion and inclined at an angle of up to 30 degrees relative to said planar center portion, wherein the demountable or removable segmental plates are each slidable to mount between respective two of said I-shaped radial profiles and are each fixed to the raised contour of the central base plate with a respective single screw bolt.
 21. Dish brush as in claim 20, wherein the raised contour comprises a plurality of contour edge plates each mounted along opposing edges to a pair of the I-shaped radial profiles.
 22. Dish brush as in claim 21, wherein the contour edge plates are fixed relative to said planar center portion and are inclined at said angle relative to said planar center portion.
 23. Dish brush as in claim 22, wherein said I-shaped radial profiles are disposed at apices of said planar center portion and are welded to said planar center portion, each of said contour edge plates being welded along the respective opposing edges to the respective pair of the I-shaped radial profiles.
 24. Dish brush as in claim 1, wherein said demountable segmental plate elements are each provided with a respective segmental rounded plate part on a radially outer side to provide the dish brush with a circular periphery, wherein the segmental rounded plate parts have a thickness equal to a thickness of the segmental plate elements.
 25. Dish brush as in claim 18, wherein the polygonal central base plate includes a planar center portion and a plurality of planar contour edge plates affixed thereto, each of the planar edge plates being inclined at an angle of up to 30 degrees relative to said planar center portion, wherein the demountable segmental plate elements each extend adjacent to an underside of, and parallel to, a respective one of the planar contour edge plates.
 26. Dish brush of claim 18 wherein said locking or attachment elements comprise respective single screw bolts inserted through boreholes in said demountable or removable segmental plates and said polygonal central base plate. 